Blower



N. E. FUNK.

BLOWER.

APPLICATION FILED FEB. 6. I919.

rits BLOWER.

Specification of Letters Patent.

Patented June 6, 1922.

Application filed Febrary 6, 1919. Serial No. 275,294.

7 0 all 107mm it may concern.

Be it known that l, Nansen E. FUNK, a citizen of the United States of America, residing at ll lontclair, county of Essex, State of New Jersey, have invented certain new and useful Improvements in Blowers, of which the following is a specification.

This invention relates to blowers, gas-exhausters, pumps and the like. An object of this invention is to provide simplicity of construction and operation, reduced numher of o ierating parts and greater efficien- -cy. in the most preferred form of the invention, the casing is of substantially circular cross section and provided with two ports, one of which is the intake or exhausting port and the other the outlet or pressure port; within the casing is mounted the impeller to be movable within the easing. Either port is the intake or exhaust ing port and the other the outlet or pressure port, dependent upon the direct-ion of rotation of the impeller. Between the intake and-the outlet is provided preferably the single rotary abutment having an intravalvular portion adapted to receive the blade or blades of the impeller and permit such blade or blades to pass therethrough in substantially sealed relation therewith. Such intravalvular portion comprises a plurality of face portions having a definite relation with the path of rotation of the valve and the path of rotation of the blades of the impeller.

Further features and objects of the invention will be more fully understood from the following description and the accompanying drawings, in which- Fig. 1 is a vertical central section of a blower embodying my invention;

Fig. 2 is a side elevation of Fig. 1;

Fig. 3 is a side elevation of the impeller;

Fig. 4 is a side elevation of the rotary abutment Fig. 5 is an end elevation of the valve;

Fig. 6 is a detail longitudinal sectional view of the impeller and a single blade thereof, on a somewhat enlarged scale; and

Fig. 7 is a detail transverse sectional elevation, on an enlarged scale of the rotary abutment.

Referring to the drawings, the casing 1, of substantially circular cross section, is provided with the supporting feet 2, preferably having the bolt holes 3, for the reception of bolts for securing to a suitable base. Centrally mounted within the casing 1 is the impeller l having the oppositely disposed blades 5, ('3. The base is preferably of a drum formation, to thereby effect substantially circularly annular path of flow of the air or other gas through the casing 1. The drum of the impeller 4 may be hollow as shown and provided with recesses for receiving the respective blades 5, 6. The impeller 4 is mounted on the shaft 7 fixed thereto.

Each blade is provided with the sealing edge 8 comprising a plurality of sealing face portions, shown in the specific embodiment illustrated as three in number, and designated respectively 9, 10, 11. Such central face portion 9 is substantially circular, the center of which is coincident with the center 12 of the impeller drum 4, as indicated in Fig. 6. Such central face portion 9 functions to seal the air when each blade passes the wall of the annular chamber and the central portion of the wall of the abutment. The oppositely disposed face portions 10, 11 are substantially circular, the center of the face portion 10 being indicated at 13 and the center of the face portion 11 being indicated at la. y,

Correlative with such sealing face portions 10, 11, respectively, of each impeller blade 5, 6, the rotary abutment 15 is provided at its intravalvular face 16 with the substantially central face portion 17 and the outer, oppositely disposed face portions 18,

19. The central face portion 17, see Fig. 7, is substantially circular the center of which is indicated at 17 with the allowance of proper clearance to provide unobstructed passage of each impeller blade 5, 6, there through while effecting a substantially gas sealing relation therewith, as noted above. The face portion 18 of the rotary abutment 15 is substantially circular, the center of which is indicated at 20, Fig. 7, and correspondingly the face portion 19 is sub stantially circular, having its center at the point indicated at 21. In the preferred form of theinvention such hollow valvular portion has a depth greater than the radius of the cross-section of the rotary abutment and thereby permitting the blade of the impeller to be effectively lengthened.

The rotary abutment 15 as a whole is provided with the oppositely disposed studs 22, 22 and may be cast hollow, as indicated.

The ports of the casing 1 of the blower are respectivelly indicated at 23, 24. Upon rotation of the impeller in the direction of the arrow 25, see Fig. 1, the port 23 constitutes the intake or exhausting port and the port 24 constitutes the outflow or pressure port. llpon reverse rotation of the impeller 4:, the port 23 constitutes the outflow or pressure port and the port 9A constitutes the inflow or exhausting port.

The casing l of the blower is closed by the oppositely disposed substantially fiat circular face plates 26, 27, positioned by the bolts 28 or equivalent. Each face plate 26, 27 is provided with the centrally disposed bosses 29 for the reception of the ends of the shaft 7 of the impeller t, and the laterally disposed bosses 30 for the reception oi" the studs 22, 22 of the rotary abutment 15. The blower is driven by a bolt or equivalent, driving the pulley 31, or equivalent, fixed on the shaft 7 at one end of the impeller. At the opposite end of the shaft 7 is fixed the gear 32 meshing with the gear 33 fixed on a stud 29. ot the rotary abutment 15. The gear 32 is of twice the radius of that of the gear 33 whereby the rotary abutment 15 is rotated twice for each revolution of the impeller at.

The invention is advantageous in increasing to a marked degree the capacity of the blower as compared with blowers of prior construction and having the same di ameter oi casing. The invention is further advantageous in that each propeller blade is effective throughout its travel in impelling the air through the blower and substantially without creating any vacuum or back pressure. in accordance with the most preferred forms of the invention, the propeller blades form a substantially closed fluid seal with the inner walls of the blower casing and without frictional engagement therewith, and at the same time the parts of the blower, particuhrrly the impeller blades, are capable of being constructed by simple machining processes. The single rotary abutment, driven by a gear having a diameter less than that of the circular or sealing portion of the valve, increases the effective length or" the annular passage of the drum, in that the ports 23, are more closely positioned and enables substantially the entire path of impelling movement of the ii'npeller to be utilized, in other words, by reason of the single rotary abutment to, the exhausting and pressure ports are located practically substantially one next to the other and the entire circumference of the annular passage of the blower is utilized for producing the compression and the cor responding exhaust-ion.

It will be noted that by reason of the relatively small diameter of the drum and relatively great length of each blade, the cross-section of the annular path of the fluid through the casing and through the rotary abutment materially increases the output of the blower. Such arrangement combines with my improved gearing arrangement to materially increase the capacity oi? the blower per horse power required.

For the use with air or other gas, the device operates as a blower o1- exhauster; for use with water or other liquid, the de vice operates as a pump.

vVhi-n'eas T have described my invention by reference to specific forms thereof, it will be understood that many changes and modifications may be made without departing :trom the spirit of the invention, as defined by the appended claims.

I claim.

1. The combination of a casing having a substantially annular passage and provided with an inlet and outlet, an impeller comprising a drum of. substantially circular cross-section and a pair of blades, each 01.

said blades being formed of" rigid material and extending over substantlally the full width of said annular passage, each blade having a sealing face formed of an odd number oi convex portions, the curvature of the central convex portion being less than the curvature of the remaining convex portions, a single circular rotary abutment disposed between said inlet and said outlet, said abutment means being provided with a hollow valvular portion having a i'ace'i ormed of an odd number of concave portions, the curvature of the central concave portion being greater than the curvature of the remaining concave portions and gearing means tor said impeller and said rotary abutment means.

The combination of a casing having a substantially annular passage and provided with an inlet and an outlet. an impeller comprising a drum of substantially circular c1 ss-section and a pair of blades, each of said blades being formed of rigid material and extending over substantially the full width of said annular passage, said blades being disposed diametrically opposite one another, each of said blades having a sealing face formed of three convex face portions, the intermediate convex face por lion being of less curvature than the remaining two convex face portions, a single circular rotary abutment disposed between said inlet and said outlet, said abutment means being provided with a hollow valvular portion having a face formed of three concave portions, the curvature of the intermediate concave portion being greater than the curvature of the remaining two concave portions and gearing means for said impeller and said rotary abutment ieans.

In testimony whereof" I have signed this specification this 23rd day of January. 1919.

NELSON E. FUNK. 

